How does PCT maintain the pH and ionic balance of the body fluids?

How does PCT maintain the pH and ionic balance of the body fluids?
  1. By reabsorbing essential nutrients
  2. By selective secretion of hydrogen ions and ammonia into the filtrate
  3. By absorption of HCO₃⁻ from the filtrate
  4. By all of the above

Solution

PCT helps to maintain the pH and ionic balance of the body fluids by selective secretion of hydrogen ions and ammonia into the filtrate and by absorption of HCO₃⁻ from it.

Asked in: NCERT

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